update sigs and testing instructions for 16.04.6.2

Author: dougburks

checksums.txt

@@ -1,3 +1,8 @@
+16.04.6.2 ISO image
+md5sum 788d4a659484c3f87085d1487c5040db
+sha1sum 53ebc519e76eb9cd34be298039ecdd5e77c9c9fd
+sha256sum ad7f4342e40285ed50e813b0e2f7c23ff69e950646bd1467c2e9d34fadfde978
+
 16.04.6.1 ISO image
 md5sum ca835cef92c2c0daafa16e789c343d1d
 sha1sum a0035c140ae3b017180e249a65ff4dac2d4981a1

sigs/securityonion-16.04.6.2.iso.sig

@@ -0,0 +1,51 @@
+### 16.04.6.2 ISO image built on 2019/08/26
+
+### Download and Verify
+
+16.04.6.2 ISO image:  
+https://github.com/Security-Onion-Solutions/security-onion/releases/download/v16.04.6.2_20190826/securityonion-16.04.6.2.iso
+
+Signature for ISO image:  
+https://github.com/Security-Onion-Solutions/security-onion/raw/master/sigs/securityonion-16.04.6.2.iso.sig  
+
+Signing key:  
+https://raw.githubusercontent.com/Security-Onion-Solutions/security-onion/master/KEYS  
+
+For example, here are the steps you can use on most Linux distributions to download and verify our Security Onion ISO image.
+
+Download the signing key:  
+```
+wget https://raw.githubusercontent.com/Security-Onion-Solutions/security-onion/master/KEYS
+```
+
+Import the signing key:  
+```
+gpg --import KEYS
+```
+
+Download the signature file for the ISO:  
+```
+wget https://github.com/Security-Onion-Solutions/security-onion/raw/master/sigs/securityonion-16.04.6.2.iso.sig
+```
+
+Download the ISO image:  
+```
+wget https://github.com/Security-Onion-Solutions/security-onion/releases/download/v16.04.6.2_20190826/securityonion-16.04.6.2.iso
+```
+
+Verify the downloaded ISO image using the signature file:  
+```
+gpg --verify securityonion-16.04.6.2.iso.sig securityonion-16.04.6.2.iso
+```
+
+The output should show "Good signature" and the Primary key fingerprint should match what's shown below:
+```
+gpg: Signature made Mon 26 Aug 2019 04:29:53 PM EDT using RSA key ID ED6CF680
+gpg: Good signature from "Doug Burks <[email protected]>"
+gpg: WARNING: This key is not certified with a trusted signature!
+gpg:          There is no indication that the signature belongs to the owner.
+Primary key fingerprint: BD56 2813 E345 A068 5FBB  91D3 788F 62F8 ED6C F680
+```
+
+Once you've verified the ISO image, you're ready to proceed to our Installation guide:  
+https://github.com/Security-Onion-Solutions/security-onion/wiki/Installation